Water cooled silencer



s- 1, 1943. H. H. MAXIM 2,328,161

WATER COOLED SILENCER Filed April 12, 1941 64 E 61 INVENTOR 62' 60 fiimmwzmvMAx/M BY Y 65 U A fT NEYS Patented Aug. 31, 1943 WATER COOLED SILENCER Hiram Hamilton Maxim, Hartford, Conn., assignor to The Maxim Silencer Company, Hartford, Conn., a corporation of Connecticut Application April 12, 1941, Serial No. 388,230

1 Claim.

The present invention relates to a construction of silencers adapted particularly for installations of considerable size in which water is to be mingled with the gases during their passage through the silencer. It is well recognized that the addition of water to the exhaust gases not only prevents the passage of sparks but due to its cooling action on the gase gives a much more eiii-cient silencing action. The particular purpose of the present invention is to provide a construction of water inlets for large size silencers which will be eiiicient in construction and will also secure the necessary uniform mingling of the water with the gases.

This application is a continuation in part of the application filed jointly by myself and Leslie E. Knapp, December 2, 1939, Serial No. 307,288,

now Patent No. 2,238,816, granted April 15, 1941.

Referring to the drawing,

Fig. 1 is a median section through one form of water inlet particularly adapted for silencers formed of cast iron; I

Fig. 2 is a section on line 2--2 of Fig. 1;

Fig. 3 is a section similar to 1 but of a modified form of construction;

Fig. 4 is a median section through a silencer designed to be made of sheet metal;

Fig. 5 is a section on line 5-5 of Fig. 4;

Fig. 6 is a detail showing a slightly different form of water entrance; and

Fig. '7 is a section on line 'l-'! of Fig. 6.

In Fig. l the inlet section of the muffler has been shown. It includes a cylindrical casin l having an end header H and an intermediate header 12. a tubular member 13 having an outer flange l4 spaced from the header l I by suitable gaskets l and held in position as by bolts it. By changing the gaskets the width of the variable annular gap l1 between the end of member [3 and the header [2 may be changed as desired. The member l3 serves as an inlet connection for the silencer. The headers II and I2 are connected by a bridge piece I8 forming a generally U-shaped chamber, best shown in Fig. 2. A water inlet pipe l9 passes into this chamber, and water entering through it passes first into the interior of the annular chamber formed between the bridge piece It! and the member l3, and then through the annular slot 22 to mingle with the exhaust gases passing through the member l3. The exhaust gases, together with the water mingled with them, then pass through a central aperture in the header l2 into a tubular member which may convey them to any desired silencing apparatus, which it is not necessary to describe here.

Extending through the header II is The water inlet shown in Fig. 3 is similar in principle but utilizes a diiierent construction. In this the casing 25 has an end header 26 and an intermediate partition 21 between which and the end wall 26 water may be introduced through an inlet 28. A gas inlet tube 29 is coupled as by bolts 30 to the intermediate partition. The inlet end of this conduit is preferably flared outwardly as at 31 and a tube 32 is secured to the end wall as at 33 with intermediate packing 34 so that the width of the annular slot 35 may be varied in the manner described above. The water inlet may be tangentially arranged so that a whirling action is given to the water which assists in evening out the flow through the entire annular gap 35.

The form shown in Figs. 4 and 5 is particularly suited to silencers constructed of sheet metal and intended for submarine work. The shell 36 is provided with end headers 31 and 38 and is divided by an intermediate partition 39 into two chambers 40 and 4! whose lengths are preferably in non-integral ratio. The inlet tube 42, preferably slotted as at 43, is in this case carried by a partition M of segmental shape welded to the cylindrical wall as at and also to the tube 42. A wall member 46 joins the partition 44 with the end wall 31 and is also welded in place as at 46. By this means a segmental chamber surrounding the tube 42 is provided. The outer portion of the tube is flared as at 41 so as to leave an annular gap 48 between it and the end of the gas induction pipe 49. A water connection 5!] permits water to be introduced into the segmental chamber. The outlet pipe 5!, also slotted as at 52, enters the chamber 49; and the two chambers 40 and M are connected by a plurality of open ended tubes 53 having a plurality of holes 54 arranged along their lengths, preferably at the half and quarter point so as to prevent any tendency to resonance. Vents 55 are provided to facilitate draining, a hole 55 in the partition 39 and the eccentric position of the discharge conduit 5| insuring that the silencer will always drain itself after being flooded by the submersion of the submarine. The same construction Without the necessity of the vents 55 will permit passage through the silencer of the water introduced through the gases 48. The form shown in Figs. 6 and 7 is similar, except that the annular chamber 6E1 surrounding the gap BI is formed of a generally cylindrical wall member 62 Welded at 62 between the end header 63 and an end piece 64. In this instance the water inlet may be a radial pipe 65.

partment, means for introducing water into said 10 compartment, an outlet pipe eccentrically arranged in the second chamber, and tubes passing through the partition to join the chambers and having a combined area. substantially equal to the area of the outlet opening, at least some of said inlet and outlet tubes and the chamber connecting tubes being formed with lateral escape openings in their walls.

HIRAM HAMILTON MAXIM. 

